import java.util.Scanner;

public class wx1 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入年份：");
        int year = sc.nextInt();
        if (Math.abs(year) > 999 && Math.abs(year) < 10000) {
            System.out.println("是正确的年份！");
        } else {
            System.out.println("不是正确的年份！");
            System.exit(0);
        }
        if (year % 4 == 0 && year % 100 != 0) {
            System.out.println("您输入的年份是闰年！");
        } else {
            System.out.println("您输入年份不是闰年！");
        }
    }

}